yicangzongtai_app_240321/uni_modules/sakura-canvas/js_sdk/utils/util.js

// 路径转base64
import { base64ToPath } from '../plugins/image-tools'

/**
 * 计算文字长度
 * @param { CanvasText } Context Context
 * @param { String } text 文本
 * @param { String } fontSize 文字大小
 * @returns 
 */
export const countTextLength = (Context, text, fontSize) => {
	const length = measureText(Context, text, fontSize)
	return length !== 0 ? length : text.length * fontSize
}

/**
 * 计算文字大小
 * @param { CanvasText } Context Context
 * @param { String } text 文本
 * @param { String } fontSize 文字大小
 * @returns 
 */
function measureText(Context, text, fontSize) {
	if (Context.measureText) {
		return Context.measureText(text)?.width || 0
	}
	// 这是为了兼容钉钉小程序,钉钉小程序没有Context.measureText方法。。。
	let length = 0
	for (let i of text) {
		length += countStrLength(i)
	}
	return length * fontSize
}

/**
 * 计算字符大小
 * @param { String } t 字符
 * @returns 
 */
function countStrLength(t) {
	let l;
	if (/a/.test(t)) {
		l = 0.552734375
	} else if (/b/.test(t)) {
		l = 0.638671875
	} else if (/c/.test(t)) {
		l = 0.50146484375
	} else if (/d/.test(t)) {
		l = 0.6396484375
	} else if (/e/.test(t)) {
		l = 0.5673828125
	} else if (/f/.test(t)) {
		l = 0.3466796875
	} else if (/g/.test(t)) {
		l = 0.6396484375
	} else if (/h/.test(t)) {
		l = 0.61572265625
	} else if (/i/.test(t)) {
		l = 0.26611328125
	} else if (/j/.test(t)) {
		l = 0.26708984375
	} else if (/k/.test(t)) {
		l = 0.54443359375
	} else if (/l/.test(t)) {
		l = 0.26611328125
	} else if (/m/.test(t)) {
		l = 0.93701171875
	} else if (/n/.test(t)) {
		l = 0.6162109375
	} else if (/o/.test(t)) {
		l = 0.6357421875
	} else if (/p/.test(t)) {
		l = 0.638671875
	} else if (/q/.test(t)) {
		l = 0.6396484375
	} else if (/r/.test(t)) {
		l = 0.3818359375
	} else if (/s/.test(t)) {
		l = 0.462890625
	} else if (/t/.test(t)) {
		l = 0.37255859375
	} else if (/u/.test(t)) {
		l = 0.6162109375
	} else if (/v/.test(t)) {
		l = 0.52490234375
	} else if (/w/.test(t)) {
		l = 0.78955078125
	} else if (/x/.test(t)) {
		l = 0.5068359375
	} else if (/y/.test(t)) {
		l = 0.529296875
	} else if (/z/.test(t)) {
		l = 0.49169921875
	} else if (/A/.test(t)) {
		l = 0.70361328125
	} else if (/B/.test(t)) {
		l = 0.62744140625
	} else if (/C/.test(t)) {
		l = 0.6689453125
	} else if (/D/.test(t)) {
		l = 0.76171875
	} else if (/E/.test(t)) {
		l = 0.5498046875
	} else if (/F/.test(t)) {
		l = 0.53125
	} else if (/G/.test(t)) {
		l = 0.74365234375
	} else if (/H/.test(t)) {
		l = 0.7734375
	} else if (/I/.test(t)) {
		l = 0.2939453125
	} else if (/J/.test(t)) {
		l = 0.39599609375
	} else if (/K/.test(t)) {
		l = 0.634765625
	} else if (/L/.test(t)) {
		l = 0.51318359375
	} else if (/M/.test(t)) {
		l = 0.97705078125
	} else if (/N/.test(t)) {
		l = 0.81298828125
	} else if (/O/.test(t)) {
		l = 0.81494140625
	} else if (/P/.test(t)) {
		l = 0.61181640625
	} else if (/Q/.test(t)) {
		l = 0.81494140625
	} else if (/R/.test(t)) {
		l = 0.65283203125
	} else if (/S/.test(t)) {
		l = 0.5771484375
	} else if (/T/.test(t)) {
		l = 0.5732421875
	} else if (/U/.test(t)) {
		l = 0.74658203125
	} else if (/V/.test(t)) {
		l = 0.67626953125
	} else if (/W/.test(t)) {
		l = 1.017578125
	} else if (/X/.test(t)) {
		l = 0.64501953125
	} else if (/Y/.test(t)) {
		l = 0.603515625
	} else if (/Z/.test(t)) {
		l = 0.6201171875
	} else if (/[0-9]/.test(t)) {
		l = 0.58642578125
	} else if (/[\u4e00-\u9fa5]/.test(t)) {
		l = 1
	} else if (/ /.test(t)) {
		l = 0.2958984375
	} else if (/\`/.test(t)) {
		l = 0.294921875
	} else if (/\~/.test(t)) {
		l = 0.74169921875
	} else if (/\!/.test(t)) {
		l = 0.3125
	} else if (/\@/.test(t)) {
		l = 1.03125
	} else if (/\#/.test(t)) {
		l = 0.63818359375
	} else if (/\$/.test(t)) {
		l = 0.58642578125
	} else if (/\%/.test(t)) {
		l = 0.8896484375
	} else if (/\^/.test(t)) {
		l = 0.74169921875
	} else if (/\&/.test(t)) {
		l = 0.8701171875
	} else if (/\*/.test(t)) {
		l = 0.455078125
	} else if (/\(/.test(t)) {
		l = 0.333984375
	} else if (/\)/.test(t)) {
		l = 0.333984375
	} else if (/\_/.test(t)) {
		l = 0.4482421875
	} else if (/\-/.test(t)) {
		l = 0.4326171875
	} else if (/\+/.test(t)) {
		l = 0.74169921875
	} else if (/\=/.test(t)) {
		l = 0.74169921875
	} else if (/\|/.test(t)) {
		l = 0.26904296875
	} else if (/\\/.test(t)) {
		l = 0.416015625
	} else if (/\[/.test(t)) {
		l = 0.333984375
	} else if (/\]/.test(t)) {
		l = 0.333984375
	} else if (/\;/.test(t)) {
		l = 0.24072265625
	} else if (/\'/.test(t)) {
		l = 0.25634765625
	} else if (/\,/.test(t)) {
		l = 0.24072265625
	} else if (/\./.test(t)) {
		l = 0.24072265625
	} else if (/\//.test(t)) {
		l = 0.42724609375
	} else if (/\{/.test(t)) {
		l = 0.333984375
	} else if (/\}/.test(t)) {
		l = 0.333984375
	} else if (/\:/.test(t)) {
		l = 0.24072265625
	} else if (/\"/.test(t)) {
		l = 0.435546875
	} else if (/\</.test(t)) {
		l = 0.74169921875
	} else if (/\>/.test(t)) {
		l = 0.74169921875
	} else if (/\?/.test(t)) {
		l = 0.48291015625
	} else {
		l = 1
	}
	return l;
}

/**
 * 转换单位
 * @param { Object } params 转换的数据集合
 */
export const conversionUnit = (params, getConvertedValue, _this) => {
	const filterAttrs = ['quality', 'alpha', 'deg', 'zIndex', 'e', 's', 'drawImage', 'drawModeImage']
	const filterObject = () => {
		const result = Object.assign({}, params)
		Object.keys(params).forEach(key => {
			const value = params[key]
			if (!filterAttrs.includes(key)) {
				if (typeof value === 'number') {
					if (value !== 375.0001) {
						result[key] = getConvertedValue.call(_this, value)
					}
				} else if (typeof value === 'object' && !(value instanceof Array)) {
					result[key] = conversionUnit(result[key], getConvertedValue, _this)
				} else if (value instanceof Array) {
					result[key] = value.map(item => typeof item === 'number' ? getConvertedValue.call(_this, item) : item)
				}
			}
		})
		return result
	}
	if (!(params instanceof Array)) {
		return filterObject()
	} else {
		const filterArray = () => params.map(item => conversionUnit(item, getConvertedValue, _this))
		return filterArray()
	}
}

/**
 * 下载网路图片资源
 * @param { String } url 图片路径
 * @param { Object } options 参数
 * @returns 
 */
export const downloadFile = (url, options = {}) => {
	return new Promise(resolve => {
		const { header = {} } = options
		try {
			const download = uni.downloadFile({
				url,
				header,
				success: res => {
					return resolve({
						success: true,
						data: res
					})
				},
				fail: err => {
					return resolve({
						success: false,
						message: `下载资源${url}失败---${JSON.stringify(err)}`
					})
				}
			})
		} catch(e) {
			return resolve({
				success: false,
				msg: `下载资源${url}失败---${JSON.stringify(e)}`
			})
		}
	})
}

/**
 * base64转本地路径
 * @param { String } path 路径
 * @returns 
 */
export const base64ToPathFn = path => {
	const reg =
		/^\s*data:([a-z]+\/[a-z0-9-+.]+(;[a-z-]+=[a-z0-9-]+)?)?(;base64)?,([a-z0-9!$&',()*+;=\-._~:@\/?%\s]*?)\s*$/i
	if (!reg.test(path)) {
		return Promise.resolve(path)
	}
	return base64ToPath(path)
}

/**
 * 保存图片到相册
 * @param { String } filePath 图片文件路径，可以是临时文件路径也可以是永久文件路径，不支持网络图片路径
 * @returns 
 */
export const saveImageToPhotosAlbum = filePath => {
	return new Promise(resolve => {
		uni.showLoading({ title: '保存中...' })
		uni.saveImageToPhotosAlbum({
			filePath,
			success: res => {
				resolve({
					success: true,
					data: res.file
				})
			},
			fail: err => {
				resolve({
					success: false,
					message: err
				})
			},
			complete: () => {
				uni.hideLoading()
			}
		})
	})
}